Samuel shafeb



s. SHAFER, JR. DELIVERY CHUTE FOR MIXING MACHINES.

APPLICATION HL ED SEPT. 24, 1913.

Patented Aug. 22, 1916.

STATES SAMUEL SHAFER, JR, 0F MILWAUKEE, WISCONSIN, ASSIGNOR TO CHAIN BELT COM- PANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

DELIVERY-CHUTE FOR MIXING-MACHINES.

Specification of Letters Patent.

Application filed September 24, 1913. Serial No. 791,608.

To aZZ whom it may concern:

Be it known that I, SAMUEL SHArnR, Jr, a citizen of the United States, residmg at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Delivery- Chutes for Mixing-Machines, of which the following is a specification.

My invention relates to chutes for delivering material and has been devised with special reference to bemg used in combination with a concrete mixing machine; but, as will readily be understood, it is not l1mited in its practical applications to such use. The chute may be employed for delivering material into a revolving mixing drum or for delivering material therefrom, as is the case in the embodimenthere illustrated, or it may be used alternately for both purposes.

The invention consists in a novel support or mounting for an adjustable delivery chute such as will be herein described in de tail.

In the accompanying drawings, F1gu're 1 is a rear elevation of a concrete mixing machine to which my invention is applied; Fig. 2 is an elevation of one end of the machine, the mixing cylinder being shown in vertical section and the chute in position to deliver material from the interior of the cylinder outward; Fig. 3 is a view similar to Fig. 2 except that here the delivery chute is represented in position to operate as a feed chute for delivering material into the cylinder or, in case the cylinder is provlded at the opposite end with feed mechanism, to act as a cut-off for preventing the escape of material from the cylinder while it is being mixed. Fig. 4 is a vertical section taken on the line IVIV of Fig. 1.

In the drawings, 2 designates a revolving drum or cylinder in which concrete or other material is mixed. This element of the machine may be of any preferred construction and supported and driven by any suitable means. In the drawings but a portion of the discharge end of the cylinder is shown. In this end of the cylinder there is formed an axial opening 3. Stationary framework 4 is erected near the end of the cylinder and serves as a support for the delivery chute and its adjusting and operating mechanism. This chute, 5, consists of a trough or spout so supported that its inner end extends into the cylinder. through the opening 3, while its outer end is outside of and beyond the cylinder. The chute 5 is supported upon a shiftable fulcrum about which it may be rocked from the out-delivery position in framework and carrying a pair of crank arms 1O, 11, the former being considerably shorter than the latter. The two crank arms 10, 11, are preferably integral, and duplicated upon the shaft for structural and practical working reasons. Links 12 connect the short crank arms 10 with the chute, such connections preferably being at the pivots 6. Other links 13 connect the longer crank arms 11 with the chute, the latter connections being pivotal and at points between the pivots 6 and the outer end of the chute, as indicated at 14.

Suitable means are provided for turning the shaft 9, those illustrated consisting of a shaft 15 provided with an operating handle 16 and carrying a sprocket wheel 17 connected by chain belt 18 with a sprocket wheel 19 on shaft 9.

A stationary chute 20 supported by brackets 21 from the framework may be provided, to receive the outer end of the delivery chute when adjusted to position to deliver from the mixing cylinder, thus serving to form in effect a continuation of the delivery chute. Its presence, however, is not essential to the invention.

By comparison of Figs. 2 and 3, it will be seen that the positions of the pivots 6 and 14, when the chute is in the discharging position shown in Fig. 2, are lower than those occupied by them when the chute is in the position shown in Fig. 3. And it will also be seen that in moving from one position to the other the pivots 14 travel considerably farther than do the pivots 6, owing to the crank arms which are connected with the pivots 145 being longer than those connected with the pivots 6, and both arms moving together simultaneously about the same axis. The result is that when the parts are in the position shown in Fig. 2, the chute inclines downwardly from its inner toward its outer end, with its inner end extending relatively far into the mixing cylinder, while when adjusted to the Fig, 3 position, the chute inclines in the opposite direction, its inner end extendinginto the cylinder to a less extent, and, as a whole, it occupies a higher position than at the other adjustment. This is advantageous, particularly when the delivery chute is arranged at the discharge end of a concrete mixing machine, where it, when in the Fig. 3 position, is inactive as a delivery chute except to return to the mixing cylinder such material as may tend to splash out through the opening 3. Vhen in this position it serves as a guard or cut-off for the axial delivery opening and then serves its purpose better it its inner end extends but a short distance into the cylinder, while its outer end extends relatively high, preferably to a position as high as or above the upper segment of the discharge opening 3. ()n the other hand, when the chute is adjusted to delivery position, the inner end iscarried farther into the cylinder in order to intercept a greater amount of material being raised by the cylinder, and thus more rapidly deliver it.

It will be seen that the pivots 6, which are the :tulcral supports of the chute, are shifted simultaneously with the tilting of the chute about such supports; and that, as has been stated, the movements of the pivots 14 are of greater amplitude than are those of the tulcral supports (3.

\Vhat I claim is 1. The combination of a delivery chute for a mixing machine, rocking arms to which the chute is ivoted, a shaft carrying rocking arms of diiierent lengths, and links connecting respectively the shorter arm and the chute at its pivotal support, and the longer arm with the chute at a point between the pivotal support and its end.

2. The combination of a delivery chute for a mixing machine, pivoted supporting arms to which the chute is pivotally connected, a rock shaft, crank arms of different lengths carried by the rock shaft, a link connecting the shorter crank arm with the pivotal connection between the chute and one of the pivoted supporting arms, and another link connecting the longer crank arm with the chute at a point between its pivotal support and its end.

3. The combination of a delivery chute pivotally hung on movable supports, means for directing the movements of the said supports in the arcs of circles, a power shaft, means operated from the power shaft for moving the supports, thereby bodily shifting the chute, and means also operated from the power shaft for tilting the chute about the supports.

4. The combination of a pivotally supported delivery chute, arms on which the chute is supported inclining downward when the chute is tilted to deliver in one direction and upward when tilted to deliver in the opposite direction. means for shift ing the said arms thereby bodily moving the chute, and means for tilting the chute in one direction when the supporting arms incline downward and in the opposite direction when they incline upward.

SAMUEL SHAFER, JR.

Vitnesses Doxann FRAsnn, '31. C. Fnyn. 

